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734624

Sigma-Aldrich

Cerium(IV) oxide-samarium doped

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<0.5 μm particle size, powder, contains 20 mol % samarium as dopant

Sinónimos:

SDC-20, SDC, Samarium-doped ceria

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About This Item

Fórmula empírica (notación de Hill):
CeO2
Peso molecular:
172.11
MDL number:
MFCD04974842
UNSPSC Code:
26111700
PubChem Substance ID:
329764915
NACRES:
NA.23

form

powder

Quality Level

100

contains

20 mol % samarium as dopant

composition

Sm0.2Ce0.8O1.9

greener alternative product characteristics

Design for Energy Efficiency
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sustainability

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surface area

10-14 m2/g

particle size

0.1-0.5 μm (d50)
<0.5 μm

bulk density

1.787 g/mL

greener alternative category

, Enabling

SMILES string

[Sm].O=[Ce]=O

InChI

1S/Ce.2O.Sm

InChI key

AQGZISMLQKBRRO-UHFFFAOYSA-N

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General description

Cerium(IV) oxide-samarium doped powder (20% mol samarium doped) (SDC-20) is an electrolytic material with a high oxygen ion conductivity. Samarium ion acts as an aliovalent cation that can be incorporated into the host lattice to increase the oxygen vacancy concentration and improve the oxide ion conduction in cerium oxide. It can be synthesized by reverse strike co-precipitation technique.
Samarium doped ceria may be used as an electrolyte in solid oxide fuel cells (SOFCs). Electrical conductivity as a function of temperature of doped ceria was investigated in a study. Relation of dopant type, oxygen vacancy ordering and ionic conductivity was investigated by transmission electron microscopy and electron energy loss spectroscopy.
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Application

Cerium(IV) oxide-samarium doped can be used in the fabrication of solid oxide fuel cells (SOFCs), which can further be used as environmentally-friendly sources of alternative energy.

Storage Class

11 - Combustible Solids

wgk_germany

WGK 2

flash_point_f

Not applicable

flash_point_c

Not applicable

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We report a correlation between oxygen ionic conductivity and the enthalpy of formation of trivalent-doped ceria from the component binary oxides observed at relatively low temperatures (150-275 degrees C). The bulk conductivities of La-doped ceria samples identical to those previously
Oxygen vacancy ordering in heavily rare-earth-doped ceria.
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